good question..

i've thought hard on this, and still can only think of hobgoblins..
theres always been several different mandolas on display, including 2nd hand ones by brandnames not normally in catalogue,in my nearest hobgobs..

so all i can suggest try out the available mandolas in a couple of branches
of hobgoblin, to get an idea of what you like the feel of..

then consider actually buying direct from maker or distributer if possible..

otherwise, if you find one you like there at a good price, just take a chance and buy it

Btw..i'm curious, what kind of problems have other people told you about..?